HHMI Exploring Trophic Cascades

Why does the otter have a negative impact on the sea anemones population?

• The otters eat sea anemones

• The otters protect the sea anemones

• The otters eat the food of the sea anemones

• The otters protect the food of the sea anemones

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Why do the sea anemones have a negative impact on the Kelp population?

• The sea anemones eat the predators of the kelp

• The sea anemones eat the otters

• The sea anemones protect the kelp

• The sea anemones eat the kelp

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Why do the otters have a positive affect of the kelp?

• The otters eat the kelp

• The eat the sea anemones that eat the kelp - less sea anemones means more kelp

• The otters eat the sea anemones and when their population increases the kelp population increases

• The otters help the kelp get nutrients

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which statement is true based on the system?

• seabirds eat the grass

• seabirds eat the foxes

• Foxes eat the seabirds

• soil nutrients decrease grass growth

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

Why do the seabirds positively impact the soil nutrients

• the less seabirds the more soil nutrients

• the more seabirds the more soil nutrients

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Why does the fox population cause a negative impact on the grass population?

• The foxes eat the seabirds which decreases the amount of soil nutrients for the grass

• The foxes eat the seabirds which increase the amount of soil nutrients for the grass

• The foxes eat the seabirds who eat the grass

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

If you removed the Rinderpest virus - what would happen to the other populations?

• The wildebeest population would increase

• The vegetation population would decrease due to Wildebeest populations

• There would be less fires because the vegetation population decreased.

• All of these would impacts

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

How do the predators have a positive impact on the vegetation?

• Since the predators eat the herbivores they eat the producers

• Since the predators eat the herbivores and keep that population in check so they do not over eat the vegetation

• The predators do not eat the vegetation so it is a positive impact

• The predators eat the vegetation keeping it in control

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4